Duplicating means and method



Dec. 13,1932. L, J SAQER 1,890,915

DUPLIGATING MEANS AND METHOD Filed NOV. 23, 1931 AZZMf//E Patented De@139 1932 LOUIS J. SAVER, OF OAK PARK,

LLINES, ASSXGNUR T@ @SABLES H. JUST, SR., OF GHth@y llLLINS DUPLCATINGMEANS AND METHGB Application lei'l November 23, 1931. Serial Non5?6,738.

ll/ly invention relates to duplicating means and method with particularreference to means and method whereby more than the usual number ofcopies may be made on a duplicating machine from a single original suchas a typewritten sheet.

My invention is applicable for use with that class of machines commonlyknown as hectographs or duplicating machines usually w having va latyprinting bed over which is stretched a long and comparatively thingelatinized band or apron, the ends of the band being secured to orwound on spools adjacent the ends of the printing bed so that byrotating the spools., successive sections of the band 1giady be exposedin operative position on the lln this type of machine a platen carriagehaving a suitable platen roller thereon is 2'@ adapted to travel overthe printing bed for the purpose of impressing the original or the copysheets on the gelatinized band which latter receives the imprint fromthe original sheet and transfers it to the copy sheets.

My invention is particularly adapted for use with duplicating machinesof a type Similar to that shown in my co-pending applica` tion, SerialNo. 349,876, liled March 25. 1929, and my co-nending application SerialNo. 3a 529.629. filed April 13. 1931.

The invention may be used in connection with substantially any of thecommon types of duplicators in which the paper applying means and thebed are relatively movable and is particularly adapted for those havinga movable carri age. The usual method of operating a duplicatingrmachine similar to those mentioned is to provide an original typewrittensheet which is prepared in the usual manao ner by means of a specialduplicator ribbon.

This original sheet is placed in the carriage and the carriage is movedover the printing bed thereby applying the original sheet face downwardon the gelatin surface of the printing bed. This original sheet is thenremoved from the printing bed and blank sheets are inserted in thecarriage one at a time and impressed on the gelatin-surface therebytransferring the typewritten matter from the gelao tin surface to thecopy sheet. H This usual method provides only a limited number of copiesfrom each original sheet and my in vention is therefore intended toprovide a means and method whereby a substantially increased number ofcopies may he made Jfrom a single original typewritten sheet.

ln my invention ll provide an original type written sheet in the usualmanner so far as the face side of the sheet is concerned. ln thepreparation of this original5 however special duplicator carbon paper isused whereby a carbon copy in reverse is printed on the back of theoriginal. This original sheet is then used in the duplicator in theusual manner, i. e., by transferring the typewritten matter to thegelatin surface of the printing bed by applying the original theretoface down, then removing the original and malring the usual limitednumber of copies from the gelatin surface. This same original type- Nwritten sheet is then placed in the carriage face down and applied tothe gelatinized surface thereby leaving the reversed carbon copy exposedon the back of the original. This original sheet is then left on thegelatine to form a printing surface and copy sheets are inserted in themachine and the bottom surface of each copy sheet is automaticallymoistened as it is applied to the back of the origin nal as the.carriage is moved over the printing bed. Each copy sheet therebyreceives an impression from the carbon side of the original and a4further limited number of copies may be made in that manner.

It is therefore obvious that by means of my invention both sides of theoriginal copy may be prepared during a single typewriting operation 'andthat a considerably increased 'number of duplicate copies may beobtained therefrom.

It should be noted that the first set oi. copies is obtained from theimpression which is transferred to the gelatine 'sheet from the face ofthe original. The second set of copies is obtained from the carbonimpression on the back of the original which latter is used as aprinting surface.

One of the important features of my invention is the provision of meanswhereby the face of the copy sheets may he automatically ttt .it

moistened during the operation ol applying them to the printingsurlface. ll also provide an adjustable means tor accurately adjust ingthe moistener to a position whereby the desired amount ot moisture maybe applied to the sheets.

it :turther object is to provide an ellticient means whereby themoistener may be accurately adjusted in such a manner that the copysheets may be inserted in the carriage in the usual manner and that theplaten roller in its normal movements will bring the copy sheeteffectively into Contact with the moistener as the sheet is beingapplied to the printing surface.. j

Another obj ect is to provide an adjustable moistener preferablyresiliently mounted whereby a yielding pressure may be applied either tothesurtace ol the copy sheets or to the surl'ace oit the printing bed asdesired or whereby the moistener may be so adjusted as to allow theduplicator to be used in the usual manner without the application oitmoisture. i

tfurther obj ects will be apparent trom the specilication and theappended claims.

lln the drawing:

lltigure l is a transverse sectional view through a carriage and aportion ol the printing1 bed ol a duplicator somewhat similar to thatshown in the co-pending application, Serial No. litllh, previouslymentioned, and illustrates one embodiment ot my invention in cooperativerelation with the platen roller; and

litig. 2 is a fragmentary perspective view of one end ot the moisteningreservoir and moisture applying means supported thereon.. llhc oppositeend ot the reservoir and the adjusting mechanism ltor the moistureapplying means is eractly similar to that shown and it is believed thatthe construction will be understood without 'turther illustrationReiterring to the drawing in detail, the embodiment illustratedcomprises printing bed l9 having the usual printing surlace thereonwhich sur'lace is provided by means ot the usual gelatinised apron E2.lli carriage 3 comprises the usual rectangular 'trame worlr Yand isprovided with a platen roller Ll* rotatably mounted on arms 5 whichlatter' are se cured to a roch shalt 6 pivotally mounted in the carriagetrame. ylhe roch shalt is pro vided with a handle l by which thecarriage may be moved bach and torth over the printing bed. rl1 heplaten roller and the associated handle are mounted in a manner toprovide a lost motion movement oit the handle and roller relative to thecarriage whereby the handle and roller may be moved to the positionindicated by dotted lines in Fig. l, the platen roller thereby beingraised and lowered during each cycle ot operation.

A. pressure roller tl is mounted in the carriage trame in a position tocooperate with :aannam the platen roller in directing sheets ot paperonto the printing surtace. 'llhis pressure roller 8 is usuallyresiliently mounted in a. manner similar to `that shown in the co-pending applications previously mentioned.

any oit the usual types ot margin bars may be employed but in thepresent instance have diagrammatically illustrated a rotatable marginbar 9 which cooperates with the platen roller tor the control ot thepaper as it is being applied to the printing bed. The construction andoperation ot this margin bar is illustrated and described in the previously mentioned co-pending applicatioin tierial lilo. 529,629.,

fin angularly positioned table l0 is mount ed on the carriage in aposition-to direct the original or copy sheets ll between the pressureroller and the platen roller when the platen roller is raised at whichtime -"the margin bar is in a position to receive and support the edgeot' the paper. l`he carriage is provided with an inwardly eutendingshell l2 on which may be supported a reservoir ld to receive a suitablemoistening tluid, the res-- ervoir being provided with a 4cover ld.

Threaded rods lli are secured to the reservoir and entend throughclearance holes in the rear wall oit the carriage trame. @om pressionsprings l@ are mounted on these rods between the reservoir and thecarriage wall and tend to move the reservoir toward the platen roller,'llhe threaded rods l5 are provided with 'thumb nuts ll whereby theposition ol the reservoir may be accurately adjusted in any desiredrelation to the platen roller.. lhoclr nuts may be provided tor thesethumb nuts iii desired. vice comprises a wich' l@ projecting through theoutwardly eatending portion l9 ot the reservoir7 the outer end oli thewich: being in contact with a moisture applying roller 2U.

rl-he"roller 20 resiliently mounted asA shown in llig. d similarmounting means' is provided at each end oit7 the reservoir wheren by theroller 20 is resiliently mounted and comprises levers 2l on which theroller is pivotally montated7 the levers also being pivotally mounted at22 on the side el the reservoir. rThe outer end ot these levers comprisecomparatively thin ldat springs 23 which are secured to the levers fall,The outer end ot each spring is in contact with an adjusting screw 2lwhich is threaded in a bracket 25 on 'theend ot the reservoir. 'll`hellat springs Q3 are held in contact with the adjusting screw 2l" bymeans oit a relatively strong tension spring 26. l

llt will be obvious trom an inspection olf the drawing that thereservoir and the associated moistening means may be so adjusted that'when the platen roller is raised the paper may The moisteningl detitlalla

be inserted between the platen roller and the pressure roller andsupported in the usual manner on the margin bar and that when theassente platen roller is lowered to the full line position shown in Fig.1 the paper 11 will be moved to the position shown so that its lowersurface will be in contact with 'the resiliently mounted moisteningroller 20. This roller is adjustable by means of the screw 24 to providethe desired yielding pressure against the Paper- By means of theconstruction herein described the reservoir and moisteningmeans may bemoved outof operating position so that the duplicator may be used in theusual manner for obtaining the entire limited uumber of copies from theface of the typewrittenor otherwise prepared original.

When it is desired to moisten the surface of the paper in order toobtain copies from the back or reversed carbon side of the originaltypewritten sheet 11a which has been applied to the printing bed themoistener may be moved forward to contact with the sheets whereby eachconsecutive copy sheet will be moistened as it is applied tothe printingsurface of the sheet 11a. By this method a second supply of copies maybe obtained from the carbon side of the original sheet.

llt is sometimes desirable to moisten the gelatinized surface of theprinting bed during the back and forth movement of the carriage in Lthenormal operation of the machine. When this is desired the moistureroller adjusting screw 24 may be adjusted to allow the roller 20 to bemoved downwardly into yielding Contact with the gelatinized surface ofthe apron 2 as indicated by the dotted lines in Fig. 2, in whichposition it will be yieldably retained by. means of the tension spring26 and the flat spring-Q3 and during each back and forth movement of thecar riage the gelatinized surface will be moistened to a desired degreedepending upon the adjustment of the moistening roller.

llt will, of course, be understood that a special moistening fluid whichis adapted for use with the particular duplicating material used may besupplied in the tank 13 for the purpose of moistening the backs of thecopy sheets or the printing surface.

rlhe roller 20 may be made of any desired material suitable for applyingmoisture in accordance with the duplicating material used. Porcelain maybe used for this purpose.

In order that the copy sheets may be held accurately in registeredposition as they are being applied to the reverse side of the originalsheet 11B` which latter has previously been applied to the surface ofthe printing bed, the carriage stops may be moved slightly so that asmall portion of the margin of the copy sheet l1 will be applied to andstick to the gelatinized surface adjacent the edge of thev sheet 11a.,as shown at 27. This overhanging edge of the copy sheet on the gelatineretains the paper accurately in alignment during the printing process.

When it is desired lto make a largernumber of copies of originaltypewrittenl or otherwise prepared copy than can be produced from theface and back of the original sheet, further originals may be preparedby placing another carbon sheet back to back with the original carbonsheet during the preparation of the originalcopy. A second sheet isplaced against the second carbon paper and the copy is prepared in thesame manner as originally described thereby producing an original copyhaving the typewritten matter in reverse on the back thereof and asecond carbon copy which may at any time be applied to the gelatinprinting surface, thereby leaving an impression from which still morecopies may be made.

By this method at least three times the number of copies may be obtainedthan with the usual method of using a single original.

While l have illustrated by one embodiment of my invention it will beunderstood that various modifications may be made without departing fromthe spirit of the invention and l therefore desire to be limited only bythe prior art and the scope of the appended claims.

Having thus described my invention. what l claim and desire to secure byLetters Patent is:

l. The method of duplicating comprising preparing an original sheethaving transfer-y able copy on the face thereof and similar transferablecopy in reverse on the back thereof, applying the face of said originalto a. hectograph printing surface to transfer the original to theprinting surface, then applying consecutively blank sheets to thehectograph to provide a limited number of copies, then applying theoriginal to the hectograph surface and thereafter applying blank sheetsto the reverse side of the original to provide a further limited numberof copies. l

2. The method of duplicating comprising preparing an original sheethaving an original copy on the face thereof and reversed copy on theback, applying the face of the original to a hectograph printing surfaceto transfer the original to the printing surface,v

then applying a limited number of blank sheets to the printing surfaceto obtain copies therefrom, then applying the original sheet face downon the printing surface. then apivlying blank sheets to the back of theoriginal to obtain a further limited number of copies and applyingmoisture to the contact-- ing surface of the copy sheets "during theprocess of applying the 4sheets to the back of the original.

3. A duplicating machine including a printingbed and a carriage movablethereover, means on said carriage for transferring sheets to saidprinting bed and automatic means for moistening said sheets as tt tor.applying copy sheets lll ltd

they are being applied to said printing bed..

t. ln a hectograph machine having a printing bed and a carriage movableover said bed, a platen roller on said carriage to said bed, and amoisennig device arranged to apply moisture to said sheets as they aretransferred to said bed.

5. lin a. hectograph machine having a printing bed and a carriagemovable baclr and torth over said bed, a movable platen roller on saidcarriage for transferring sheets to said bed, a moistener on saidcarriage, said platen roller being arranged to automatically bring saidsheet-s in contact with said moistener while they are being applied tosaid bed.

ti. In a hectograph machine having a printing bed and a. carriagemovable over said bed, a movable platen roller on said carriage andarranged to apply sheets to said bed during the movement of saidcarriage, and a moisture transferring device on said carriage andarranged to yieldingly contact with said sheets during their applicationto` said bed. A

7. A hectograph machine having a printing bed, a carriage movable oversaid bed, a platen roller on said carriage and movable to and :trom saidhed., means for supporting sheets Von said carriage when said platenroller is in raised position, a moistener on said carriage, said platenroller being arranged to move said sheets into Contact with saidmoistener when said platen roller is`in its lowered position.

8. A hectograph machine having a printing bed, a carriage movablethereover, a'

platen roller in said carriage and movable to and from said bed, meansfor supporting sheets in said carriage when said platen roller is inraised position, said platen roller being arranged to apply said sheetsto said bed when said carriage is moved thereover, and automatic meansfor applying moisture to said sheets during the movement of saidcarriage.

9. A hectograpb machine including a printing bed; a carriage movablethereover, a pressure roller on said carriage, a platen roller on saidcarriage and movable to and from said bed, said pressure roller and saidplaten roller being arranged to receive a sheet therebetween when theplaten roller isin raised position, a moistener on said carriage, saidplaten roller and said pressure roller being arranged to engage saidsheets therebetween when said platen roller is in lowered position andto simultaneously cause the engagement of said sheet and said moistener.

10. AA duplicator including a printing bed having a carriage movablethereover, means on said carriage for applying sheetsto said bed, amoistener on said carriage arranged to moisten said sheets as they arebeing applied 'mtldtldil lili to said bed, said moistener comprising areservoir, a moisture applying roller coop erating with said reservoirand means tor adjusting the position ot said roller to apply apredetermined pressure to said sheets.

ll. it. hectograph machine including a printing bed, a carriage movableover said printing bed, means on said carriage to apply sheets to saidbed during movement et said carriage., and automatic means to applymoisture to said sheets as they are being applied to said bed, saidmoisture applying means being adjustable to apply moisture to said bedinstead ot to said sheets.

l2. t duplicator including a printing bed, a carriage movable over saidbed, means on said carriage tor applying sheets to said bed, a moisteneron said carriage, and adjustable means to cause said moistener to applymoisture to said sheets or to said bed during the movement ot saidcarriage.

13. ln a hectograph machine including a printing bed and a carriagemovable thereover, a platen roller in said carriage tor applying sheetsto said bed, a moisture applying means on said carriage, and means formoving said moisture applying means to or trom said bed and arranged toapply a yielding pressure against either said bed or said platen roller.

la. In a duplicator having a printing bed and a carriage movable oversaid bed, means on said carriage 'tor consecutively applying sheets tosaid bed, a moistener on said carriage tor applying moisture to saidsheets as they are being applied to said bed, said moistener comprisinga reservoir having a moisture applying means associating therewith, andadjustable means associated with said moisture applying means to causesaid moisture applying means to exert a yielding pressure against eithersaid bed or said sheets.

15. A hectograph machine including a printing bed having a carriagemovable thereover, means on said carriage for applying consecutivesheets to said bed, a moistener on said carriage for applying moistureto said bed as the carriage is moved thereover, said moistenercomprising a reservoir adjustable toward and from said sheetapplyingmeans,

"means associated with said reservoir for applying the moisture, andmeansfor adjusting said moisture applying means toward or from said bed.

In witness whereof, I have hereunto subscribed my name.

LOUIS J. SAUER.

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